2346

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Number

$2346$ (two thousand, three hundred and forty-six) is:

$2 \times 3 \times 17 \times 23$

The $68$th triangular number after $1$, $3$, $6$, $10$, $15$, $\ldots$, $1891$, $1953$, $2016$, $2080$, $2145$, $2211$, $2278$:

$2346 = \ds \sum_{k \mathop = 1}^{68} k = \dfrac {68 \times \paren {68 + 1} } 2$

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